Stereotype apparatus



Jam, 12 1926. 1,569,491

c. E. HOPKINS S'I'EREOTYPE APPARATUS Ofiginal il d May 17. 1922 6 Sheets-Shee't -i FIG.2.

1N VEN TOR.

A TTORNEYS.

Jan 12,1926. 1,569,491

C. E., HOPKINS ST REOTYPE APPARATUS z n Filed sh 1922 s Sheets-Sheet '2 m: liif R v 1f INVENTOR.

A TTORNEYS.

Jan. 12 1926.

c. E. HOPKINS- STEREOTYPE APPARATUS 6 Shuts-Sheet 5 Griginal Filed May 1'7. 1922 Mm mm A TTORNEYS.

A Jan. 12,1926.

C. E. HOPKINS STEREOTYPE APPARATUS Original Filed May 17, 1922 6 Sheets-Sheet 4 F II V INVENTOR.

A TTORNEYS.

Jan. 12 1926; 1,569,491

C. E. HOPKINS sTER'BoTYPE APPARATUS Original Filed May 17, 1922 g shutpsmt 5 ATTORNEYS.

Jun; 12,1926. 1,569,491

- I c. E. HOPKINS s'rsnso'rrrn APPARATUS Qriflnal Filed y 9 6 Sheets-Sheet 6 FIGJB; I

IN VEN TOR.

ATTORNEYS.

1Patented 12, 1926-" i i UNITED STATES PATENT 'orsica' cnaanns E. HOPKINS, or rLAmrIELnnnw JERSEY; THE PLAINFIELD 'rnus'r M 4 v PANY ADMINISTRATOR or SAID cHAnLEsE. norxrns, nnonasnn. H

Z '0 all evil-omit may concern:

' Be it known that I, Crmnnns E. HorKms, a citizen of the United States, residin at Plainfield, in the county of Union and tate of New Jersey, have invented a new and use- =ful Stereotype Apparatus, of which the followingis a specification.

This invention is intended foruse on a casting apparatus for the production of 10 curvedstereotype printing plates for use on high speed printing press cylinders, thedie face of the cast being formed by a flexible matrix. I have shown it in a form comprising a concave back fixed between-side frames L5 in a Vertical position. Each side frame has a track over which rollers carry a co-acting convex core, means are provided for turnlng the core from a horizontal position in front 'of the backs concavity to a vertical position within the said concavity. The principal' features of this invention are: The arrangement of. a pouring sheet on rock arms to cooperate with the rock mo- 1 tion of a core and pivot out of the back on i too. support above and away from its con cavity.

The arrangement of a bottom ring having a concave face for forming a bevel on the lock up edge of a cast, and an opposing bevel for forming a rib side on said cast, for the purpose of locating the joining of the core and ring at the face of said rib. I

The locating of ledges on the back and bottom ring to grip the bolster-0f a matrix so ,it isbent or crimped.

. The arrangement of matrix positioning fingers so they are'moved into and out of position automatically.

The arrangement of plate rail guides 'to hold and carry the rar past thestrai ht edges of a core, in alignment and para lel with the core, and thereafter move the said.

rails in the reverse direction.

The joining of. a pair of casting bars through the outer ends of a pair of toggle arms, and the joining of the pivot pins of the toggles to a slide bar, and the attaching of a lever to one of the toggle arms, through which the toggles can be expanded to move the casting bars away from each other, andmove back by reversing movement.

The formation of casting bars with aledge, to form a positioning recess onthe vertical izontal position with a cast which is artly broken away to d ported on plate rails, above and free fromv STEREOTYPE Arrm'rns. I Application men sa 17.1922, Serial in. 561,668. Renewed m a, 1925f edges of a east 7 along'the interior of said cast, and act as end walls or grooves formed in a core, and

ing drawings, in which- Fig.1 is a front end view of a preferredv form of the invention. The core is turned and in locked vertically disposed back. v

Fig. 2 is a side view. The core is shown. in a'tilted position away from the back resting on the bottom ring-and the pouring over and in alignment with the core, also moved up the guidesheet is shown pivoted ways,

Fig. 3 is a side view with a portion of the back broken away to show the tilted bottom ring. The core is turned to the .hor-

show the core, an sup the cores periphery. The front frame is removed and the end frame sectioned about its center, one of the coresupport extending arms is also removed. The pouring sheet is shown turned up and supported.

over the pivot rod.

position within the and to form aguideway means for locking the core to the back. Y I The arrangement of bolster packing strips i overya recess so they can pivot into the re- Fig. 4 is a front end view showing the members in the same position as in Fig. 3. r 1

. Fig. 5 is alan view with parts broken away and in t e same position as in Fig. 1.

Fig. 6 is a vertical section on line AA of i Fig. 5 of the upper end of the mold members and illustrates the core pouring sheet guideway and its co-a'cting spring actuated presumed to be moving I of a core support latch. The core is into the back. The end ing rod is about to be engaged by the latch. I

ig. 7 is a horizontalsection of the back .sectioned on line B of Fig. 3 and illustrates matrix positioning fingers enthe slidin gaged wit the core operating cams.

Fig. 8 is a horizontal section on line CO of Fig. l with the casting bars in the open position and the bolster packing strip tilted back into its recess. f

Fig. 9 is the same as- Fig. 8 with the casting bars in locked position. 7 Fig. 10 is an enlarged cross section of the back and core, a cast is shown fast to the cores periphery and a flexible matrix adhering to the cast 'Thisview illustrates the bolster packing strip tilted and pushed back into its recess for thepurpose of allowing the cast and matrix to pass by. It also shows a casting bar moved back, and how the bar acts as means for forming a recess along the edge of said cast.

Fig. 11 shows the slide finger, and the core operating cam, in the engaged position, the cam supporting arm is sectioned on line DD of Fig. 7 l

Fig. 12 is a horizontal sectiontaken on line EE of Fig. 13 and is articularly intended to illustrate the joimng of thebottom ring and casting bars and a bottom ring bolster su port.

Fig. 13 is a ragmental illustration showing the back sectioned vertically and centrally as indicated in Fig. 12, the core seated on thebottom ring and its pivot support. Aportion of a cast C is shown sectioned as in the back, a portion of a matrix M is, shownbetween the back and cast.

Fig. 14 is a greatly enlarged view. to show how the ring is held by a r ng support, how the ring is grooved to form a lock up bevel on the lower end of a cast and how itis joined in the center clamped and crimped between a bolster supporting ring formed in the backs concavity, and a projection on the top edge of the bottom ring.

Fig. 15 shows a back in section with a matrix bolster B positioned over and in front of thebacks bolster support. It also shows the bottom ring in the tilted position just before engaging and crimping the bolster, a fragment of the ring is dotted in to show its normal tilted osition.

Fig. 16 is a fIOl'lt VlGW of the bottom ring support with the ring attached.

Fig. 17 is a plan view of the bottom ring shown in Fig. 16. 1

Fig. 18 is a cross section of the core and its supporting brackets taken on line FF of Fig. 1. It also shows the plate supporting rails in section.

Fig. 19 is a plan view of the casting bars, and their co-acting part-s.

Fi 20 is a vertical cross section on the line 20-20 of Fig. 5 of the core supporting roller and its railguard.

Fig. 21 is an end view of a plate cast by this machine to illustrate the purpose of forming a recess on the inner straight edge of the cast, and how one side of a plate guide rail of a finishing machine enters so a of a rib forming groove with the core. It also shows how the lower bolster of a curved matrix is frames 11 and 12. The top edge of each.

side frame is formed with a reversed V track 13.

A co-acting convex core 14 is located in front of the backs concavity. The core is mounted on extensions 15'formed on a pair of core supporting brackets 16, and'made fast to the extensions by cap screws 17. See Fig. 18. Each supporting bracket has an outward extending arm 18, in which is fas-,

tened a short stud-19, on which is rotatably mounted a V faced core carrying roller 20, located on the side frame V tracks.

The ends of the core supporting brackets (toward the back) are formed with abearing in which is located a core rock shaft 21. center of this rock shaft is one end of a core turning rock lever 22. The opposing end is held by a pin 23, located in bearings formed on a cross end frame 24. This rock lever See Figs. 3 and 7. Fastened to the."

causes the core to turn as the rollers move along the tracks, toward the back, andthe lower end of the core enters in and on a bottom ring 25. See Fig. 2. The bottom ring port 26 operative, on short studs 27, located in hearings on the bottom of the back 10. See Figs. 2 and 3. The bottom ring 25 performs the functions of closing the bottom of the castin chamber, holding the bottom curved side 0 a flexible matrix, forming a bevel on the lower end of a cast, necessary for lockup on the printing press, and one half of the lower rib formed on the concaveside of a cast. The ring is recessed on its top edge. The outer side of the recess has a bevel 28 called the lockup bevel. The opposite side is vertical with a short bevel 29 at the top, called the rib bevel. This bevel 29 forms (when ring) one side of a V-shaped recess or groove. See Figs. 14 and 16. By thus unit- 25 is mounted on a pivoted ring 'sup-.

its

the core is seated over the ing the ring and core the joining comes in the center of a rib R, formed on the interior of the cast and any leakage, due to improper seating, is taken care of in the finishing operation, of shaving the cast as shown in Fig. 21;

The ring support is held up in an angular position by a compress spring 94, mounted on a push re 95, operating thrua recess formed in a cross brace 96.

. The outside of the ring is provided with a positioning ledge 30, which engages over a corresponding ledge 31, formed in the backs concavity. See Figs. 14 and 15.

dom to fluctuate slightly bracket extensions 15, b

' porting the matrix bolster B along matrix bolster B and thickness of the matrix.

. knuckle c vided with a co-acting ledge 33, around its top periphery as shown in Fig. 15. This ledge 33, bending the bolster back or crimping it so it is firmly held between the ring and ledge, making thereby aperfect sealing means, regardless of the variation in the See Fig. 14.

The bottom ring 25 is mounted on and attached to its support 26, so it will have free- With the changing temperature to conform with the expansion and contraction of the core, caused by intermittent casting. For this purpose there are provided three studs 27. threaded near their heads and blank at their ends. See Figs. 14 and 17. They are threaded from the inside of the ring support 26, and their blank ends are located in corresponding holes in the ring 25.

The means forming the straight side walls of the casting chamber compose two slide bars, called casting bars 34. See Figs. 5, 12 and 19. tweenthe core 14, and the core supporting bracket 16. They are provided with recesses 35, through which pass the core supporting which the bars are guided. The casting ars are joined together b two pairs of toggle levers 36. The joint stud 37, of the toggles is madefast in a longitudinal slide bar, 38, operating in guideways formed on the under face of the core. One of the toggle levers is provided with an operating lever 39, by the rocking of which the casting bars are caused to move out beyond the convex edges of the core, or retract within the saidedges.

'When the core is in casting position, within the backs concavity, the core is locked rigidly in position, by the expanding of the toggles and pushing out of the casting .bars until two projecting ledges 40, formed on th'ebars,

engage under a set-of locking hooks 41, fast on the ed es of the back 10.

Located beneath the ocking hooks-41,in a recess formed along the straight edges of the backs concavity, are bolster packing strips 42. Each strip has formed on its inner edge a slight projection 43. This pro- 'ection extends within the radius of the acks concavity, and is the means for sup t e straight margins of a matrix. See Figs. 10 and 13.

Alongside of, and parallel with, each locking extension 40 of the casting bars is an elevation 44 which engages in front of a projection 43 of the bolster packing strip. The top of this elevation-47 forms part of the side wall of the casting chamber. The

longitudinal bolster The casting bars are located becan pass,

clamps it against the.

packing strip 42'is centrally located over recess 45, back of this incline is a vertical wall 48 against which the bolster packing strip engages andis held against the ad vanced' casting bar. The bolster packing strips 42, are held loosely in position by two pivot pins 46.

On unlocking the core from the back with a cast adhering to the cores periphery, the bolster packing strip is rocked forward and pushed back into the recess 45, by the advance of the matrix bolster B, and cast O, as plainly shown in Fig. '10- A recess 47, formed along the edge of each casting bar 40, and located next the core forms a ledge 48 extending into the casting chamber for the purpose of forming a corresponding recess S, in. a cast C, said recess acting as a means for positioning a I cast in a fimshingmechanism, (not shown) of one side of a guideway J of a finishing mechanism entering so a shaving knife K as shown in Fig. 21. See Figs. 10 and 19. i

V-shaped grooves are formed entirely around the cores periphery to form corresponding ribs R, on a cast. The ends of the grooves are closed by the side faces of the casting bars, whereby the ribs formed on the cast are made shorter than the periphery of said cast.

On the upper end of the back is a thin metal pouring sheet, curved to fit the concavity of the back. The purpose of the pouring sheet is to overlap the top edge of a flexible matrix and guide the molten metal past and over the top edge of said matrix,

'when placed in casting position, within the backs concavity. The pouring sheet is arranged so it can be instantly positioned within the back for casting purposes, and thereafter follow the cast out of the back, move lengthwise of the cast. to withdraw from engagement with the matrix, separate from the cast, and move to a support over the backs concavity. See Figs. 2, 3, 4 and 5.

The means I employ to procure this result comprises a-pair ofvertically disposed brackets 49, made fast, one at eachside of the backs concavity. The Jupper ends of the brackets are connected by a tie rod 50. In front of the tie rod is located a rock shaft 5l,upon which are made fast two rock arms 52. In bearings formed on the an incline forming a.

free ends of the rock arms are located pourformed with a arm bearings.

ingl sheet pivot rodsfi53QEach 'rod is srpliare edged collar 54, located' to engage It The pouring sheet 55 has straight parallel backward. extending wings 56, provided with a hole, through which pass the inner rod ends 53. A lock nut is'located onthe .rod tor the purpose of clamplng the wingf56against the collar." The outer end of the" wing 56 'is turned outward to engage against one of the straight faces of the collar. 54,; forithej'purpose of preventing its ssibleturning on the road.

7 Located on the pivot shaft is an eccentric mechanism, consistingof. an eccentrically mounte'dwheel 58, onjwhich is mounted a ring 59. This ring is provided with an outwardly extending bearing in. which is pivotedone end ofa 'ull spring 60, the opposite end ot'which is eld bya small bracket 61,

fastened on top of the back. See, Fig. 6.

. Made fast to the upper end of the. core "14 is apair of brackets 62. Each bracket has'a vertically disposed guideway 63. A

' gap isiormed throu h the' guideway at its bottom. in which is 1 ocated a spring actu:

I so ated latch pin 64. See Fig. 6. The purpose of this latch is to allow the inner ends of the pouringsheet rods 53, to pass through the gap by. pushing down the latch as the a core moves verticall and take up a position in front of the late in and inalignment ee Figs. 6 and 1. In

with the guideway.

this position the pouring sheetrods 53, are caused .to follow the guideways 63, during the rocking of the core out of the back. As this rocking progresses the rods 53 are caused to move up along the guidewa s by theirpivoted arms 52 until the gui eway passes under the rodsl Durin this 0 eration the pourin sheet '55 has -ollowe and pulled lengthwise of the core, and out of 'port on top of the pivot shaft and stay rod to to the matrix engaging position. See Fig.2. As the rods 53, become free from the guide-' ways, the eccentric comes into play and the spring tension causes the eccentric to act as a lever and pivot the pouring sheet on its supthe position shown in Figs. 3 and 4.

. For the purpose of holding and osition' ing a matrix in curved positionwithin the ,backs concavity, when the core is out of casting position, I have arranged automatic operating slide fingers along the straight I sides of the back. The slide fingers 65 are mounted on angle brackets 66, which are fastened on the straight side of the back 10.

' The fingersare slidably mounted in dovetailed guides in the angle brackets, Fig. 3. They are located so then inner sides can be pushed over and engage the top side of the olster packing strip 42, and cause it to pivot over from the tilted position shown in Fig. 10 on to the flat edge of the back, and

in the position shown in 7, and

e inner ..face of the rock position, cam lower face of t pass over the edge of the bolster packing strip into the concavity of the bac Tn this position, a matrix is curved so its then as n.

straight sides engage. beneath the slide fingers and then the matrix is pushed down until its bottom curved end rests u on the" led e 31, form'edin the bottom'en of the bac s concavity, envelope the ho st er support ring 32, wheresh'eet is then pivoted'down over and on to the top margin of, the matrix by the pouring sheet operating handle 67. The coreis and its curved. bolster B upon it is in casting position. The pouring v then rolled forward and turned over by'lifting up and pulling forward on the lever 39 until a seat 68 formed on the end of the supporting brackets 16 engage supporting seat- 69 formed on the bottomring support 26, and the core comes to rest on top of the bottom ring (see'Fig. 2). -The core is then pivoted over on the ring pivots until it is stopped by positioning lugs 70, formed on r the core, supporting brackets near the top. Then the'lever 39is pushed up as in Fig. 1,

which causes the toggles to expand and push the castin bars out, whereupon the advanced si e-of the locking rojection 40 will engage the inner side of t e fingers 65,

and push them back as shown in Fig. 9.

On moving the core back to its horizontal e core supporting brackets, engage a rojecting arm 72, on the slide fingers an cause the fingers to move in as shown in Figs. 7 and 11.

plates 71 vfastened to each" When the core with a cast formed thereon I is moved out of the back it is necessary'to- I remove the cast from the periphery of the core. For this purpose I have located a plate carrying rail 73 at each straight side of the core, and arranged them so they would hold the cast in parallel alignment with the face of the core. For this purpose the plate supporting rails 7 3 are made movable in a vertical plane toward and over the sides of the core. The rail isformed with an inward extension 7 4: (see Fig. 1) located in a roove formed at right angles to the core in the side of the core supporting bracket. The rail is held in position by a stud 7 5. See Fig. 18.

As the core is turned toward theh'orizontal position, a foot 76, formed on and beneath the rail 73, engages a cross brace Y motion causes the cast'to separate from the core anl rest on the rails as shown in Figs. 3 and 4.

On the. reverse motion of the core the rails are forced back by lugs 78, formed on.

located in a groove formed in the face of the roller 20, and slides along and in advance I of the -roller,in either direction. See Figs.

5 and 20.

The back is provided with an inlet'pipe- 90, at itsbottom for'the passageof cooling water into a chamber W. For the pur ose of keeping the chamber completely Filled with water at all times, there is a stand pipe 91, entering through the bottom and extend ing to a short distance from the top. See Figs. 2 and 6.

A cooling chamber X is provided in the core. This" chamber is formed with a dis tributing pocket Y at its bottom into which water enters through an opening 92, Fig. 8. Near the top is an expansion chamber Z for the purpose of overcoming the danger of the inner wall being pulled apart by the longitudinal expansion of the outer casting surface,-and is means for equalizing the expansion. An overflow pipe 93, is located so as to extend through the expansion chamber to the end of the cooling chamber. This lag ' of slide fingers 65.

pipe is to prevent the formation of steam or-collection of air above the expansion chamber or in the top of the cooling chamher when in casting position. See Fig. 6. Having described the construction of my invention,

The core is placed in the horizontal position, with the pouring sheet on its support as shown in Fig. 3. A flexible matrlx M is then curved with its casting face within. The two lower corners of the-matrix bolsters B; are inserted beneath the-inner ends The matrix is then pushed backward on the concave face of the back, and down until its lower curved edge engages the backs positioning ledges. The pouring sheet 55 is then turned down. In this position the lower end of the pouring sheet will overlap the top edge of the matrix. Having positioned the matrix in the back, the core is rolled forward until its bottom engages with the bottom ring 25 as shown in Fig. 2. From this position the core rollers are lifted slightly from the tracks and the core is pivoted with the bottom ring into casting position within the back, in which position it is stopped by the positioning stops 70.

The operator now lifts straight up on transferred from the core I will now explain its operation.

the core turning handle 39, which lifting causes the casting bars to move out from beneath the core and enga e the inner ends I of the matrix them out and the PIOJQCtlOIlS on the casting bars beneath the locking locking the core and back receive a charge of molten the chambers open top.

After allowing time for the metal to solidify,

handle 39 and unlocks the chamber. He

pbsitioning ngers 65, pushes i .70 hooks,-thereby in position to metal through then pulls back and pivots the core awayfrom the back, carrying the cast and matrix along. During thispivotal movement the pouring. sheet is caused'to follow the core,

and owing to its independent pivoted movement, it moves transversely away. from the -matrix. The core begins to lift out of the bottom ring and turn. Thesupporting rods move along ways until. the guides pass under, whereupon the eccentric 58 continues .the pouring sheet pivot movement and carries it to its support'as'in Fig. 3.

The lower ends of the core plate rails engage with their stop,-

pouring sheet the core guideto the plate rails as shown in Figs. 3 and 41'.

with this engagement the. fingers 65' are and the cast is- Simultaneously shoved back into the matrix holdingposif.

tionby the cam plates 71, Fig. 7.

The operator then peels the matrix free from the cast and re-positions it for a'f following operation.- The cast'is then slidalong the rails into a finishing mechanism, q or anyother support, to be located in front.

Having now particularly described and in what manner the same is to be per 1. In a curved stereotype plate castin apparatus, the combination with a .bac

supported in fixed position,'and a core mov able in front of the back, of fingers mounted ascertained the nature of my invention, and

maformed, I declare that what I claim is':-,-

tus having a back and. core, the com ination with matrix positioning means on the back, of means on the core for moving the matrix positioning means in for the purpose set forth.

3. 1n acasting apparatus, a casting back provided with means for positioning a matrix slidable inwardly toward the core in a straight line, and independent means for moving the positioning means into or out of engaging position.

4. In a curved stereotype casting apparatus having a back supported in a vertical plane and core supporting tracks, between Which said back is located, the com- 75 l the operator pulls down on the bination of a core operative on said tracks,

a slide finger located on each side of the back, of means carried with the core for moving the finger in when the core is moved away from the back to clamp the matrix to the core, and out of the way when the core is moved to the back. f

5. In a curved stereotype casting apparatus, the combination with a concave back, of positioning means located at each straight edge of the concave back, and

.. means for automatically moving the positioning means into and out of operative position, for the purpose set forth. I

6. In a stereotype plate casting apparatus having a back and core, the combination. with'matrix positioning means on the back, of means on the core for moving the matrix positioning means in, said means comprising cam plates projecting beyond the core, said matrix positioning means hav ing arms located in position to be moved by the cam plates as the core moves in or out.

7. In a curved stereotype plate casting apparatus, the combination with a curved casting box adapted to supporta matrix, of a bolster packing ring in position to engage the convex side of the matrix bolster, with means on the concave side for bolding the top of the bolster of the matrix and for the purpose set forth.

10. In a curved stereotype casting apparatus, havng a segmental core and a coacting back, the combination with a ring support pivoted beneath the casting apparatus, of core seating means located over and extending beyond each side of the pivot, for the purpose set forth.

11. A. curved stereotype casting apparatus having a convex core and a bottom ring, grooves being formed around the periphery of said core, one side of a. groove formed near the bottom of said core, and a co-acting side of a groove formed on the aforesaid ring, for the purpose set forth.

12. In a curved stereotype casting apparatus, the combination with a vertically disposed concaved back, and a bottom ring pivotally held in the backs concavity, of a compress spring for supporting the said ring in a tilted position for the purpose set forth.

13. In a curved stereot pe casting a paratus, the combination of a matrix bolster supporting means located to support the convex side of a bolster formed on a flexible matrix curved and positioned within the backs concavity, a movable bottom ring located within the backs concavity and facing the aforesaid bolster supporting means having a projecting top edge formed on the outside face of the ring, and means for moving'the ring so the projecting edge engages the convex face of a bolster formed in said matrix at the upper side of the bolster supporting means, for the purpose set forth. 14. A casting apparatus having a vertically disposed back upon which is pivotally supported a pouring sheet that can be swung on its pivot into or out of engagement with the back, for the purpose set forth.

15. In a casting apparatus, a back and a core, means for supporting a pouring sheet, means for moving the pouring sheet into casting position, and movable means for moving the said pouring sheet out of casting position automatically for the purpose set forth.

16. In a casting apparatus, a vertically disposed back and a core, means on the back for supporting a pouring sheet, means for moving the pouring sheet into casting position, and movable means on both the core and back for moving the said pouring sheet out of castin position automatically for th pur ose set orth.

1 In a curved casting apparatus having a vertically disposed back, a pouring sheet, pivoted arms located above the back. for supporting the pouring sheet, and means whereby the pouring sheet can be swung down into the backs concavity, for the purpose set forth.

18. In a casting apparatus having a cast ing back, a, pouring sheet, pivot arms for supporting the pouring sheet, so located that the pouring sheet can be turned down and engage the casting face of the said back, and means for assisting said sheet to reverse the pivotal movement for the purpose set forth.

19. In a curved stereotype casting apparatus, having .a back and a movable core, the combination of a pouring sheet supported above the back, pivotal means for moving the pouring sheet to engage the back, and means on the core for moving the said pouring sheet out of engagement with the said back, for the purpose set forth.

20. In a casting apparatus having a fixed back and a pivoted core, a sheet over the back, a pivot arm fast on said shaft, 'a pouring sheet carried by said arm, means for supporting the pouring sheet above the said shaft, means on the core for moving the pouring sheet in alignment with the pivotal movement of the core and simultaneously lengthwise of said support.

core, and means for thereafter causing it to swing up to its cally disposed fixed back and a pivoted core, a bracket, a shaft over the back, supported by the bracket, a pivot arm fast on said shaft, a pouring sheet carried by said arm, means for supporting the pouring sheet above the said shaft, means for swinging the said pouring sheet. down on the back, means on the core for moving the pouring sheet in'alignment with the pivotal movement of the core and simultaneously lengthwise of said core, and means for thereafter causing it to swing up to its support.

22. .In a curved casting apparatus, a curved pouring sheet having extending wings provided with a recess and a ledge at their ends, straight side edge, one end of said rod extending through the recess and the straight side engaging the aforesaid ledge, and means for holding the pouring sheet and rod in locked position for the purpose set forth.

23. A curved stereotype casting apparatus having a curved pouring sheet formed with a pair of parallel projecting wings, and pivot rods secured to said wings.

24. In a. curved stereotype casting apparatus, the combination of a vertically disposed concaved back, a pouringsheet curved to fit the backs concavity, means for moving the said pouring sheet out of engagement with the backs concavity, and means for thereafter swinging it upward and over the moving means, for the purpose set forth.

25. In a stereotype plate casting apparatus having a trio'vable core, the combination therewith of guide-ways located on the end of the core, a back co-operating with thecore, a pouring sheet movably mounted on the back, and a latch on the back cooperating with, the guide-ways, pose of controlling the motion ing sheet.

26. Ina casting apparatus, the combinafor the purtion of a vertically disposed concaved back,

side frames having tracks thereon, a segmental convex core located between the frames, a supportingbracket'at-tached to each side of the core, a projecting armion each bracket on the outer end of which is mounted a roller, located above and on said track, and means for swinging the core as the rollers move along the tracks for the purpose set forth.

27. In a casting apparatus, a concave back having a convex segmental core of a circumference less than the back and provided. with rooves formed around the periphery, means for spacing the core and back to form a curved casting chamber therein between, and movable means for closing the groove end opening, and extending the core side of the chamber to correspond with the backs circumference, as and for the purpose set forth.

28. In a casting apparatus having a curved casting'cham'ber formed between a a supporting rod formed With a of the poursegmental back and core, the combination therewith of bars slidingly operative over the core edges to form the side walls of the chamber, and means on the bars for forming a portion of the chamber-of a less circumference than the main chamber for the purpose set forth.

29. In a curved stereotype casting apparatus having a segmental core, the combination of core supporting brackets formed with elevations to which the core is fixed, slide bars located between the core and brackets and operative alongside the aforesaid elevations, toggles for moving the bars, and means for operating the toggles for the "purpose set forth.

30. In a curved stereotype casting appa- .ratus having a movable segmental core, supports fastened on each side of the core, a

cast supporting rail operative on each core support, and means for holding the said cast supporting rails parallel with the periphery of the core at all times.

32. In a casting apparatus having a con cave back and convex core, supports for the core, supportingrails operative on the coresupports, means for holding the said rails Hit) in alignment with the periphery of the core,

means for moving the core and its supports, means for stopping the rail during a portion of the movement for the purpose of engaging the edges of a curved cast and holding said cast against further moveinent of the core for the purpose set forth.

In a casting apparatus having a concave back and convex core, supports for the core, matrix clamping means carried by the core, cast supporting rails operative on the core supports, means for holding the said rails in alignment with the periphery of the core, means for moving the core and its supports, and means for stopping the cast supporting rail during a portion of the movement for the purpose of engaging the edges of a curved cast, located on the periphery of the core and holding said cast against further movement of the core, and means for'stopping and holding the rails to reverse the movement for the purpose set forth.

34. In a casting apparatus having a vertically disposed concave back, a segmental convex core cooperating with the back to of the casting chamber, a toggle mechanism connecting the movable members, a slide bar connected with the toggle and operative in fixed bearings, and means for moving the slide bar to expand or contract the toggle arms folthe purpose set 'forth. 4 y

35. In a curved stereotype casting apparatus, a vertically positioned back, a .core movable from a horizontal position in front of the back to a vertical position withinthe back, means carried with the core for separating a cast from the casting face of the to slide along and keep the said track clear ing means for the purpose set forth.

37. A segmental core having a Water cooling chamber, the inner wall of which is formed with angles for the purpose of equalizing the expansion of the casting face of said core.

38. A segmental core provided with a cooling chamber, and a distributing chamber located at one end and an expansion chamber near the opposite end.

39. A segmental core having a coolingchamber and an expansion chamber, and a stand pipe passing through and above said chamber, for the purpose set forth.

10. In a stereotype plate mold, the COIHlOI" nation with a back and core, of a movable packing strip at the edge of the back havor engaging the back of the edge of a matrix at the margin thereof, and a ositionin finger 'outside the mold mov ab e inwardl y toward the mold cavity for engagin said packing strip and moving it into p ace. a

41. In a stereotype plate mold, the (.Ombk nation with a back and core, of a movable packing strip at the edge of the back, a positioning finger outside the mold mounted to slide inwardly toward the mold at an angle and having a point for engaging the packing stri and means for guiding and supporting t e finger.

42. A. stereotype plate casting box having longitudinal bolster packing strips movable to a transverse position across the' edges of the moldcavity to support the matrix bolsters along the straight margins of the matrix and capable of rocking to.

free the matrix bolsters.

43. A stereotype plate casting box hav-- ing longitudinal triangular spaces in the edges of the back, and bolster packing nation with a back and core, of a movable packipg' strip at the edge of the back pro vided with an inwardly extending lip at its edge for engaging behind the edge of 76 the matrix and a matrix clamp ada ted to p be moved outwardl from wlthin or engaging the edge 0 the matrix over said lip and clamping it thereto.

45. In a stereotype platemold, the combination with a back and 'core, of matrix.

clamps carried by the core, and means for turning the core into the concavity of the 'back and for thereafter moving the matrix clamps into position'in the back to form the straight side walls of the casting chamber.

46. In a stereotype plate mold, the combi nation with a back and core, of matrix clamps and locking bars on the core, slideways on said bars, slides movable along said slideways, rocking levers connectin the said slides for o crating them, an neans for rocking sal levers for the purpose set forth. i

47. A stereotype plate castin box having a semi-cylindrical core and bee and a casting bar on each flat ed e of the core, said: bars each having a longitudinal recess providing an extension of the casting chamber beyond the ing lon itu recesses along the interior edges 0 the cast plate for receiving a finishing machine guide way.

48. In a stereoty e plate mold, the combination with a bar pouring sheet pivotally mounted on the back, means on the core for movingthe pouringsheet in alignment with the pivotal. movement of the core and simultaneously lengthwise of the core, and means for there- .110 aftercausing the sheet to swing up on its support.

49. In a stereotype plate mold, the combi Y nation with a bee and pivoted core, of a pouring sheet pivotally mounted on the back, means on the core for moving the pouring sheet in accordance with the pivotal movement of the core, the pouring sheet having extending ygs each provided with arecess and a latch at its end, a supporting engaging said latch, and means forholding the pouring sheet and rod in locked position.

50. In a stereoty ie plate mold, the combination with a ban; and pivoted core, of a pouring sheet pivotally mounted on the back, a pi otal supp rting evi e for the riphery'of the core for produc- 100 ina and pivoted core, of a 105 pouring sheet, an eccentric thereon, an eccentric ring on the eccentric connected with the pouring sheet to move therewith, yielding means for holding the eccentric ring in position to hold the away from the mold, and means on the core for turning the eccentric as the core swings out of the back.

51. In a stereotype plate casing box, the 10 combination with'a casting back and a core therefor having circumferential grooves for an end ring extending into said recess and pouring sheet up casting parallel ribs on the late and r0 v vided with 'an end recess e tending mm the end groove to the end of the core; of

15 having an end surface for casting part of said end rib, whereby the joint between the core and end ring comes at the rib. v

In testimony whereof I have hereunto affixed. my signature. I

CHARLES E, HOPKINS; 

